these 3 derivations will be built:
  /nix/store/v3czia4rp5zhq30zzl0jj0gpfv2sczbd-pi-src-with-lock.drv
  /nix/store/lr15rgh8jdbpqijablqqk0lr9d6kckf1-pi-1.0.0.drv
  /nix/store/i5kr2fim1jpyp0by0dp9fwbsgi9i8478-check-pi.drv